This discussion on religion with heavy-duty philosophers Hilary Putnam and Alvin Plantinga is from way back in 2000, but I found it well worth a listen. Somewhat ironically–considering that Putnam is Jewish and Plantinga is a Christian–I found myself more sympathetic to Putnam’s overall approach. I’m not nearly as familiar with his work, but the way he draws on pragmatism, existentialism, and negative theology resonates pretty closely with how I think about this stuff.